Question 4 Find a 95% confidence interval for the mean time required for an oil change at a local company. A random sample of N= 30 oil changes is taken and it is computed that the mean time to change oil is 17.2 minutes with a sample standard deviation of 6 minutes. O (14.95,19.44) (15.05,19.34) O (15.33,19.06)

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Question 4
Find a 95% confidence interval for the mean time required for an oil change at a local company. A
random sample of N= 30 oil changes is taken and it is computed that the mean time to change oil is
17.2 minutes with a sample standard deviation of 6 minutes.
O (14.95,19.44)
(15.05,19.34)
O (15.33,19.06)
Transcribed Image Text:Question 4 Find a 95% confidence interval for the mean time required for an oil change at a local company. A random sample of N= 30 oil changes is taken and it is computed that the mean time to change oil is 17.2 minutes with a sample standard deviation of 6 minutes. O (14.95,19.44) (15.05,19.34) O (15.33,19.06)
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